How To Upgrade Windows 7 RC To RTM

With the release of Windows 7 RTM to TechNet and MSDN subscribers Windows has reached a major milestone as most of the XP, Vista, and Windows 7 RC users are moving to the finest OS ever.

windows 7 intowindows logo

If you have been running Windows 7 RC, then you might want to upgrade from Windows 7 RC to Windows 7 RTM. Although Windows 7 RC to Windows 7 RTM in-place upgrade is not supported officially, you can upgrade from Windows 7 RC to RTM with a simple trick.

If you are a XP or Vista user, you might find the following articles as useful:

How to upgrade XP to Windows 7

How to upgrade Vista to Windows 7

Here is how to upgrade from Windows 7 RC to Windows 7 RTM:

1. Extract Windows 7 RTM DVD or ISO file contents to a folder, and navigate to the following directory:

Windows 7 RTM extracted folder/sources

cversion folder

To extract Windows 7 files from ISO, use zip utilities like 7Zip or Winzip or WinRAR.

2. Under Sources directory, locate the file named “cversion.ini”. Open the file “cversion.ini” with notepad.


3. Modify the MinClient value from 7233 to 7000. You can enter any number less than 7233.

cversion after

4. Save the “cversion.ini” file. Use any software to create ISO file. You can directly start upgrading from RC to RTM build by running setup.exe file in the root of the folder.

windows 7 rtm setup

5. Start upgrading from Windows 7 RC to Windows 7 RTM.

Note that it’s always better to do a clean Windows 7 RTM to get better performance results.



  1. Meena says

    My values are

    to what value should i change them? 🙁
    Plz help

  2. Paul says

    Just to be clear Donald’s advice worked except instead of all caps use EditionID to HomePremium and Product Name to Windows 7 Home Premium just the first letter was capped in each. I would see how it is in you current registry settings and follow suite with that if they are ll capped then follow that mine registry entries were not all caps. but this along with the cversion changed worked fine for me. Thank You So much guys!!
    Donald Murphy
    Posted November 15, 2009 at 4:57 am | Permalink

    Open the registry and navigate to HKLM/Software/Microsoft/WindowsNT/Current Version. Change EditionID to HOMEPREMIUM and Product name to Windows7 HOME PREMIUM. You can then upgrade RC to RMM

  3. Paul says

    Hey Donald,

    Will that work for Windows 7 Professional as well? And if so what name do I use for Windows 7 Pro?

  4. Daniel says

    Is there any difference between upgrading from the RC to the RTM and installing a clean version of the RTM?

  5. Rob says

    Could you clear up how to allow the Windows Ultimate RC upgrade to Home premium. I have changed the settings down in minclient etc.

  6. admin says

    @ Nate
    Microsoft recommends a clean installation. But it’s legal as far as you are using the legal Windows 7 copy to upgrade from RC to RTM.;)

  7. Donald Murphy says

    Open the registry and navigate to HKLM/Software/Microsoft/WindowsNT/Current Version. Change EditionID to HOMEPREMIUM and Product name to Windows7 HOME PREMIUM. You can then upgrade RC to RMM

  8. Qaz says

    Hmm, I guess the RC version I have is Ultimate (are they all like this?), and it won’t let you go to a RTM version of Home Premium. Great!

  9. Qaz says

    Getting the same error, saying can’t go from Ultimate to Home Premium. I have the RC version 7100

  10. admin says

    @ Max
    I think you are trying to upgrade from Ultimate to Home Premium. So, Windows doesn’t allow you to move from Ultimate to Home Premium

  11. Max says

    I did this whole process..any reason why I’m still not allowed to upgrade from RC to RTM? I’m getting the “Windows 7 Ultimate cannot be upgraded to Windows 7 Home Premium.” message still, but WinClient is set to 7000.

  12. jec says

    Will you have a chance to enter a new product key when installing the RTM? or will it try to use the RC key?

  13. roberto says

    Hi, I have a question for you, my programs installed at RC will not be touched after upgrade?

  14. Alonso says

    do you guys know if the RTM has an expiration date?
    The RC expires on march 1, but… i don’t know nothing about the RTM. I got my copy from my university and i’ll install it tomorrow…

  15. Peter says

    Thanks.. i have got the version shown as;

    Version 6.1 (Build 7600)

    am i getting the right RTM release of Window 7?

  16. admin says

    Right-click on Computer icon and go to properties to know which version of Widnows 7 and edition you are running. You can also type winver in start menu search box and hit enter to know more about your version of Windows 7 including build details.

  17. Peter says

    Wondering how could i ensure the copy i get is RTM release? How to differentiate between RC and RTM in others word?

  18. Blesav says

    Ja sam bio velika budala i išao sam skidati x64 verziju umjesto x86 jer se nisam sjetio da trenuta?no imam windows 7 RC 32bit i kao takvu je ne mogu nadograditi s 64bit verzijom. A žao mi je jer mi se ta 64bit verzija skinula za 3 sata…a ovu 32bit skidam ve? 5h i još ?e je skidati barem par dana…ciganarija prve vrste.

  19. Joe says

    I also noticed that RTM has faster response times when i shut down my machine compared to RC. I think this is the best Microsoft has done to date.

  20. Ryan says

    Yes, there are lots of bug fixes that have been done in the RTM which haven’t been done in the RC. It ain’t just performance.

  21. admin says

    Although there are no changes in RC to RTM (except default wallpaper), RTM better as far as performance is concerned.

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